Date: Wed, 13 Jun 2001 05:18:03 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20010612
                        APACHE POINT OBSERVATORY
                        3.5m Telescope Night Log
                        Tuesday, June 12th, 2001
                                                          ACTUAL
 ASTRONOMER    OBSERVER(S)             INSTRUMENT      START  FINISH
 -------------------------------------------------------------------
G.Miknaitis    G.Miknaitis             SPIcam          --:--  --:--
D.York         D.York                  Echelle         01:14  04:51
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 UW10/R      21:15  01:00  3.8   0    0    0    0    0    0    0    0
 UC04/R      01:00  04:51  0.2   0    0    0    0   3.7   0    0    0
  note: scheduled times listed include instrument change time
                 ------------- ACTIVITY LOG --------------
 Observing Specialist: Jack Dembicky
Started cooling the enclosure at 19:00 but a dust event at 19:55 required
closing the louvers and turning the cooling fans off (press fans turned
on).  We had light rain at 21:00 that lasted for about 15-20 mins.  The
dust levels remained a bit elevated afterwards, more than I was
comfortable with to open up, since it felt humid outside from the recent
rain.  Dust levels fluctuated up and down all evening long dropping below
closure limits just to climb above them again in 15-20 mins.  Never able
to open for the first half tonight.
The dust levels finally dropped below closure limits long enough to open
at 01:12.
A sporadic glitch came thru from (I think) the observers Mac (02:25) or
the echelle auto-guider. This caused the telescope to stop tracking. A PR
was submitted. I also noticed a oscillatory pattern in the guiding
corrections in the X-direction for the echelle.  A PR was also submitted
to make Bob L. aware of this.
         --------------- INSTRUMENT FOCUS LOG ----------------
                                       Air/Truss   Wind
 Time   Instrument   Focus     Az El    Temp-C    Dir MPH  filt   FWHM"
 ----------------------------------------------------------------------
 01:21  Echelle   -39(338)    172 36   13.5/15.4  262  18  none   1.93
              ------------- WEATHER CONDITIONS ------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    71    35     27   254  (WSW)   1351   Pt. Cldy   none
     17:01    69    33     24   260  (W)     1047   Pt. Cldy   none
     18:01    67    30     18   260  (W)     1322   Pt. Cldy   none
     19:01    65    32     18   263  (W)     1077   Pt. Cldy   Dust
     20:01    63    37     23   246  (WSW)   3529   Pt. Cldy   Dust
     21:01    61    35     21   226  (SW)    2293   Pt. Cldy   Lt. Rain
     22:01    59    36     15   217  (SW)    3620   Pt. Cldy   Dust
     23:01    58    36     22   237  (WSW)   2854     Clear    Dust
     00:01    56    36     12   209  (SSW)   3895     Clear    Dust
     01:01    56    32     15   257  (WSW)   2528     Clear    none
     02:01    56    30     15   271  (W)     1671     Clear    none
     03:01    55    31     23   266  (W)     1523     Clear    none
     04:01    53    31     14   265  (W)     1536     Clear    none
     05:01    50    31     11   258  (WSW)   1504     Clear    none
  note: the wind was coming from the azimuth listed.  The convention
  used is north=0 degrees, east=90 degrees.  The dust count is particles
  > 1u per 0.1 cubic feet.
                              TELESCOPE STATUS
  Primary, secondary, and tertiary mirrors in place and collimated.
  Primary support system operational. Mirror ventilation system in place.
  Telescope drives operational. Current Remark version: 2.62. Current
  guide software version: GIm Ctrlv4.1b2. Current TCC version: 2.5.3
  Current MC version: v1_7_3.